Alinement-gage for lathes.



No. 7||,763. Patented 001.21, |902; w. c. Fox @L 0.4. sHAw. ALINEMENT GAGE FDR LATHES.

(Application 'tiled Jan. 7, 1902.)

(No Model.)

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UNITED STATES ATENT Fries.

WILLIAM C. FOX AND CHESTER J. SHAV, OF VATERLOO, IOWA.

ALlNEiVlENT-GAGE-FOR LATHES.

SPECIFICATION forming part of Letters Patent No. 71 1,763, dated October 21, 1902. Application iiled January 7, 1902. Serial No. 88,743. (No model.)

through Wear of bearings or other displacement their axes fail to coincide with their proper center of rotation. This object we effect by the means illustrated in the accompanying drawings, in which- Figure 1 represents a side elevation of a portion of a lathe having our improved alinement-gage so attached as to indicate the degree of aberration of the dead-spindle from the axis of the live-spindle. Fig. 2 is a plan View of part of a'lathe, showing our aline-` ment-gage so attached as to indicate incorrect alinement or wrong position of the tail-stock. Fig. 3 is a side elevation of the alinementgage with a micrometer attached, and Fig. 4 is a plan View of the same without the micrometer.

Similar letters refer to similar throughout the several views.

The tool consists,essentially,of a body-piece parts f, on opposite sides of which are conical holes o and 0. Each of the holes 0 and o is placed, respectively, exactly opposite to another,with their axes coinciding, but not quite meeting. The body-piece f has a taperedextension-arm p, whose extremity h is slotted and bored in order to be used as a clamp. The slot n, is of a length to afford sufficient elasticity to the sides of the clamp, whose tightness may be regulated by means of the set-screwm. lVithin this clamp a micrometer g may be inserted when desired for exact adjustments.

When it becomes necessary to bring a deadspindle cinto proper alinement with the livespindle b, an angle-plate d may be bolted to vto by means of a clamp c.

the face-plate a and the gage attached there- The gage being placed so that it lies parallel to the axis of the spindle b, an indicator, such as a micrometer g, is set within the clamp hand so as to touch the dead-spindle c. W'hen the face-plate a has been rotated one-half around, the gage will be found in the position indicated by the dotted lines, and if the live-spindle b is really displaced from its correct alinement the amount of aberration may be correctly measured by means of an indicator, such as a micrometer, and the live-center so adjusted as to bringboth the spindles into line.

Vhen the tail-stock c is supposed to be out of line, it is brought forward to such a position as will allow of the points of the spindles b and c being introduced within a pair of oppositely-placed holes o and o' in the gage. The micrometer g is then set so as to touch the surface of the face-plate ct. When the face-plate ct has been rotated one-half around, the tool will be-in the position indicated by the dotted lines in Fig. 2, and the space intervening between the micrometer-point and the surface of said face-plate will indicate the degree of displacement of said tail-stock. The tail-stock may then be moved transversely to the extent necessary to place it in proper alinement.

Inside calipers may be used in measuring the distance-between the gage and the spindle or gage and face-plate, as the case may be,

vor any other means suitable for the purpose;

but it is believed that measurement by means of the micrometer will generally be preferred, as tending to greater exactitude.

Having described our invention, what we claim as new, and desire to secure by Letters Patent, is-

1. An alinement-gage for lathes, consisting of abody-piece provided with holes on two of its sides arranged opposite to but not communicating with each other, and of an extensionarm bearing an adjustable clamp.

2. An alinement-gage for lathes, consisting of a body-piece provided with conical holes on two of its sides arranged opposite to but not communicating with each other, and an eX- tension-arm having an indicator.

3. An alinement-gage for lathes, consisting.,r

of embody-piece provided on tWo sides with holes arranged opposite to but not communieating With each other, and an extension-arm provided with an adjustable elam p, in combination with a micrometer.

In testimony whereof We aix our signatures in presence of two witnesses.

WILLIAM C. FOX. CHESTER J. SHAW.

Witnesses:

GEO. R. TURNER, HALOON G. TURNER. 

